Oh c'mon, man. Rammstein is far more than image. The strap-ones with milk were part of the show around "Buck Dich" (Bend Over in german). When they play "Seemann" (=Sailor) they have a guy crowdsurfing in a rubber dingy. It's a show, not a portrayal of their sexual choice
It's silly you do them off as gay for their acts during live shows. I bet you those guys are everything but gay. I expected better from you